Freedom Personal Safety GPS system for Symbian, Windows Mobile, and Blackberry Smartphones - Black Dimensions: 48.6 x 37.3 x 15.6 mm. 1.9 x 1.47 x 0.6 ins. Weight: 22g 0.78 oz. Rechargeable battery giving 48+ Hours Alert operational time On/Off. Mini USB charging port. Hardware "Alert" button Class II Bluetooth 66 channel MTK Chipset